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# lab_36 - LAB#36 THE INTRODUCTION TO RAY OPTICS-INDEX OF...

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LAB #36 THE INTRODUCTION TO RAY OPTICS-INDEX OF REFRACTION PART I. THE STRAIGHT LINE PROPAGATION OF LIGHT: APPARATUS: Optics Bench, Light Source, Ray Table, Component Holders, Slit Plate, Ray Table holder, and Viewing Screen. Figure 1 PROCEDURE: Setup the equipment as shown in figure 1, and turn on the Light Source. Darken the room enough so the light rays on the viewing screen are easily visible. Now, observe the light rays on the viewing screen. 1. Are the rays straight? 2. How does the width and distinctness of each ray vary with the distance from the Slit Plate? 3. Rotate the Slit Plate slowly on the component holder until the slits are horizontal. Observe the slit images on the Viewing Screen. 4. How does the width and distinctness of the slit images depend on the angle of the Slit Plate? 5. For what angle of the Slit Plate are the images most distinct? For what angle are the images least distinct? 6. On a separate sheet of paper, explain your observations in terms of the straight line propagation of light. Include a diagram showing how the width of the slit images depends on the orientation of the Light Bulb filament with respect to the Slit Plate. PART II. RAY TRACING; LOCATING THE LIGHT BULB FILAMENT: You can use the fact that light propagates in a straight line to measure the distance between the Light Source filament and the center of the Ray Table. The diagram below shows how. The rays on the Ray

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## This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.

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lab_36 - LAB#36 THE INTRODUCTION TO RAY OPTICS-INDEX OF...

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